Abstract:
The method of stabilization/solidification (S/S) is a widely used method for the
treatment of industrial and mining waste.
The s/s is based on the properties physic-chemical properties of hydraulic binders to
reduce the risks to the environment salting of contaminants (heavy metals). Six cement
matrices are used (three different types of cement): three matrices without waste and with
three other wastes.
The waste is used the unit Bordj-Menaiel Algeria (BCR). Materials are subjected to
characterization tests such as the characterization by XRD identified phases crystallized
materials namely Pb(NO3)2.3H2O, Zn (OH)2 these last are at the origin of delay hydration and
the decrease in mechanical strength of the materials S/S. Characterization by IR identifies
functional groups such as quartz, freezing C-S-H. the other leaching tests such as
commissioning test solution by acid digestion and TCLP to quantify the nature of the waste
pollutants incorporated into the cement pastes has revealed that he is trapped inside the phases
formed by S / S.
The phenomena observed in the contact monoliths and lixiviantes solutions is much
more a process of surface (exchange of chemical species)
